Rotary brush.



ROTARY BRUSH.

(A nmmon filed Junc- 29, mm)

(No Model.)

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UNITED STATES PATENT OFFICE.

WVILLIAM G. EATON, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO G. H. FLAGG, OFSAME PLACE.

ROTARY BRUSH.

SPECIFICATION forming part of Letters Patent No. 684,203, dated October8, 1901.

Application filed June 29,1901. Serial No. 66,479- (No model.)

To all whom, it may concern.-

Be it known that I, WILLIAM G. EATON, of Boston, in the county ofSuifolk and State of Massachusetts, have invented certain new and usefulImprovements in Rotary Brushes, of which the following is aspecification.

This invention relates to rotary brushes composed of a plurality oflayers of strips of fabric or other suitable flexible material radiatingfrom a central hub, the strips lyingin planes substantially at rightangles to the axis of rotation of the hub.

The invention has for its object to provide a brush of this character ofstrong and durable construction adapted to be cheaply manufactured andto be readily applied to and removed from the shaft which imparts motionto it, so that the brush can be readily applied and removed by the user.

The invention consistsin theimprovements which I will now proceed todescribe and claim.

Of the accompanying drawings, forming a part of this specification,Figure 1 represents a side View of a rotary brush embodying myinvention. Fig. 2 represents a section on line 2 2 of Fig. 1. Fig. 3 isa perspective view illustrating the operation of constructing the brush.Figs. at and 5 represent in perspective one of the annular washers andthe tubular bushing, respectively.

The same reference characters indicate the same parts in all thefigures.

My improved brush is manufactured as follows: I provide a series ofannular washers l, which may he of any suitable material--such ascardboard ,leather-board, the. --the washers being of a material whichis relatively stifi and adapted to be firmly glued to an adjacentsurface or surfaces. I also provide a tubular bushing 2, adapted toclosely fit the inner margins of the washers 1, so that the washers maybe placed upon the exterior of the bushing, theirinner edges bearing onthe outer surface of the bushing, so as to be supported thereby. Thebushing may be a short section of fibrous material-such as paper,leather boarthor strawboard-or it may be made of a sheet of either ofthese materials bent into tubular form. One of the washers 1 having beenplaced upon the bushing 2, as indicated in Fig. 3, I place upon theupper surface of the said washer a series of strips 3 of cloth or othersuitable flexible material, said strips being arranged so that theyradiate from the bushing and collectively form a-disk with an opencenter, said center being the interior of the bushing.

the external surface of the bushing, so as to receive some supporttherefrom, and are suitably overlapped, so that their outer portions Theinner ends of the strips 3 are preferably abutted against is completedby adding successively any desired number of washers 1 andbrush-sections composed of strips 3, said washers and brushsectionsalternating, as shown in Fig. 3, until a brush of the desired thicknessis formed, the inner ends of each layer of strips 3 and thecorresponding surfaces of the adjoining washers being treated with glueor cement. When the parts of the brush have been assembled and beforethe glue or cement has set or hardened, pressure is applied to theseries of washers, said pressure tending to force the washers togethertoward each other and causing them to compress the interposed portionsof the strips 3, so that the said interposed portions beco me dense andrigid after the setting of the glue or cement, and thus constitute withthe Washers 1 and the bushing .a rigid hub which securely holds the Qloose outer portions of the strips and suitably spaces the looseportions of each layer of strips from the corresponding portions of theadjacent layers.

The bushing 2 constitutes a stop or barrier for the glue or cement whichis forced inwardly from the joints between the washers and strips whenpressure is applied to said parts, said bushing preventing the expressedglue or cement from encroaching upon the shaft-receiving bore of thebrush and being firmly secured to the inner edges of the washers and tothe inner ends of the strips 3 by said glue or cement, and therebyincreasing the strength and rigidity of said inner ends and washers. Theinner surface of the bushing therefore constitutes the surface of theshaft-receiving bore, said surface being smooth and free fromprotuberances such as would be caused by the expressed glue or cement ifsaid bushing were not present.

The brush above described is adapted to be readily applied to andremoved from a shaft, the brush comprisingin one structure abrush, ahub, and a hub bushing or lining, adapted to accurately fit the shaft bywhich the brush is rotated. It will be seen, therefore, that brushesembodying my invention may be shipped from the manufacturer to theowners of machines of which said brushes are to form parts andconveniently applied and removed by said owners, the construction beingrelatively inexpensive, so that wheira brush is worn out the hubportioncan be discarded without objectionable expense.

In another application for Letters Patent of. the United States forimprovement in presses for making rotary brushes I have shown a presshaving a bed adapted to support the parts of the brush while they arebeing assembled, a central core projecting above the bed and closelyfitting the interior of the bushing, and a platen movable toward andfrom the bed and recessed to receive the core,

the acting surface of the platen being annular, so that it bears uponthe topmost washer by the pressure against it of the glue or ce mentdisplaced by the sidewise pressure ex V erted on the washers.

I claimposed of a plurality of annular brush-sections, each composed offlexible strips radially arranged to form a disk with an open center,annular spacing-Washers between which the v V 4 As an article ofmanufacture, a brush com- ,7

inner ends of the strips are compressed,.said

inner ends and washers being united by. glue 7 or cement which maintainsthe compression 7 o of the strips, 30 that the inner ends of the 1strips and the washers collectively form a rigid hub which holds andspaces the loose.

outer portions of the strips, saidhub having; I a shaft-receivingorifice, and a tubular bush 3 7 ing surrounded by the bruslrsectionsand; washers and supporting them and forming a stoporbarrierfortheglueorcementexpressed f from the joints between thestrips andwashers, the bushing being secured to the'hub by the said glueor cement, and forming the Wall of the shaft-receiving orifice.

In testimony whereof I have affixed my sig- V I 7 nature in presence oftwo witnesses. V

Vitnesses:

GEORGE W. MEALEY, C. F. BROWN.

WILLIAM G. EATON, i

